Fig. 2From: Prognostic significance of blood-based PD-L1 analysis in patients with non-small cell lung cancer undergoing immune checkpoint inhibitor therapy: a systematic review and meta-analysisForest plots of sPD-L1 versus OS/PFS in NSCLC patients undergoing ICI therapy. a–b, sPD-L1 expression versus OS/PFS; Costantini (2018a) and Tiako Meyo (2020a) examined the pre-treatment levels of sPD-L1; Costantini (2018b) and Tiako Meyo (2020b) examined the dynamic changes in the post-treatment sPD-L1 levelsBack to article page